An organic light emitting diode (OLED) display device having a built-in touch panel is discussed in which pad parts of a touch panel array are connected on a gate in panel (GIP) circuit unit formed on a lower substrate with an OLED array formed thereon. When an upper substrate is adhered to the lower substrate, occurrence of cracks in routing lines of the touch panel array is prevented. The OLED display device includes a lower substrate provided thereon with an organic light emitting diode array including a thin film transistor and an OLED and a GIP circuit unit, an upper substrate adhered to the lower substrate by an adhesive layer to face each other and provided thereon with a touch panel array including first and second sensor electrodes, and routing lines formed on the GIP circuit unit to be connected to the first and second sensor electrodes.